1045碳钢基体上Fe-Al-Cr激光熔覆涂层的耐蚀性能增强

Enhanced corrosion resistance properties of Fe-Al-Cr laser cladding coatings on 1045 carbon steel substrates.

作者信息

Luo Xixi, Cao Jing, Yu Fangli, Zhang Yalong, Tang Jianjiang, Li Xin, Xie Hui

机构信息

School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China.

State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China.

出版信息

Heliyon. 2023 Feb 20;9(3):e13855. doi: 10.1016/j.heliyon.2023.e13855. eCollection 2023 Mar.

DOI:10.1016/j.heliyon.2023.e13855

PMID:36895342

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9988475/

Abstract

Fe-Al-Cr coatings with different content of Cr additive were prepared on 1045 carbon steel substrates by a laser cladding process. The incorporation of Cr atoms can effectively enhance the corrosion resistance of the coatings. In particular, the Fe-28Al-5Cr laser cladding coating exhibits the best film quality without phase segregation. In addition, the interfacial adhesion between the Fe-28Al-5Cr coating and the 1045 carbon steel substrate is improved. As a result, the Fe-28Al-5Cr laser cladding coating exhibits the best corrosion resistance in a 3.5 wt% NaCl solution under both immersion and electrochemical conditions. However, excessive Cr additive lead to the formation of AlCr in the grain boundaries, resulting in inferior corrosion resistance. Therefore, the new findings demonstrated in this work may inspire the design of high-quality coatings with excellent corrosion resistance.

摘要

采用激光熔覆工艺在1045碳钢基体上制备了添加不同含量Cr的Fe-Al-Cr涂层。Cr原子的掺入可有效提高涂层的耐蚀性。特别是，Fe-28Al-5Cr激光熔覆涂层表现出最佳的膜质量且无相偏析。此外，Fe-28Al-5Cr涂层与1045碳钢基体之间的界面结合力得到改善。结果，Fe-28Al-5Cr激光熔覆涂层在3.5 wt% NaCl溶液中浸泡和电化学条件下均表现出最佳的耐蚀性。然而，过量添加Cr会导致在晶界处形成AlCr，从而导致耐蚀性变差。因此，这项工作中展示的新发现可能会激发具有优异耐蚀性的高质量涂层的设计。